<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>login</title>
</head>
<body>
<form method="post" novalidate>
    <span style="color:red;">{{ error }}</span>
    <input name="username" type="text"/>
    <input type="password" name="password"/>
    <input type="submit" value="登陆">
</form>
</body>
</html>